It is understood that one man has suffered life threatening or life changing burns and injuries, while the two other family members suffered smoke inhalation.

And it could take 'potentially days, if not longer' to resolve.

An internal statement within the emergency services, seen by the Bristol Post, confirmed that: “Upon checking the house the fire service discovered a significant amount of chemicals and homemade fireworks.

"The nature of the items found is such that expert advice has been requested from the Army Explosive Ordinance Department.

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Firefighters were called at around 7pm on Friday night after a neighbour saw smoke coming from a window of the property in Hastings Close.

The emergency services blocked access to Hastings Close during the operation and residents were evacuated from their homes at about 10pm. Shortly afterwards, two bomb disposal unit vans arrived so that experts could assess the chemicals.